Piezoelectric actuator device



FIG. 1 is a bottom perspective view of the piezoelectric actuator device of our invention;

FIG. 2 is an inverted front elevational view of the piezoelectric actuator device illustrated in FIG. 1;

FIG. 3 is a bottom plan view of the piezoelectric actuator device illustrated in FIG. 1;

FIG. 4 is a top plan view of the piezoelectric actuator device illustrated in FIG. 1; and,

FIG. 5 is a left side elevational view of the piezoelectric actuator device illustrated in FIG. 1, the right side being a mirror image thereof.

The broken line showing of the environment is for illustrative purpose only and forms no part of the claimed design. 

The ornamental design for a piezoelectric actuator device, as shown and described. 